One member of Super Junior Yesung this time released a duet song with singer Jang Hye Jin by I Am Behind You. The song has been released by some Korean music sites like Melon, Dosirak, Mnet, Naver, Soribada and Bugs.

Both have a fairly smooth golden voice. Yesung voice and Jang Hye Jin blends well which is able to bring the atmosphere of melancholy and heartbreaking.